Side Wearing on a Thrust Crankshaft Bearing

[4402tuff4u]

I was looking at the old original thrust bearings that came out of the 440 and the bearings had some wearing - thin flaking metal delaminating off the side of the bearing. The machinist said that you will find that to occur on manual transmissions more than anything - when people ride the clutch. What would cause that to happen on a auto transmission car? Just normal wear and tear? Just curious.

[Chryco Psycho]

having a converter balloon can cause it to push on the crank & prematurely wear the thrust , other things can nause it as well such as a slightly bent con rod

[tecmopar]

Actually, the thrust bearing takes more of a beating in an automatic car because whenever its in gear its putting a load on the crank, even at idle. Look carefully at the thrust bearing surfaces on the crank for any abnormal wear. It should be nice and pretty, good luck.